Android Question Clear Bluetooth UART Example

[ElliotHC]

I am trying to establish serial comms with a BLE Bluetooth module using the Transparent UART Service.

So far after reading all the Bluetooth related posts, I can't seem to find any clear working example.

I have the Bluetooth Chat example project Bluetooth.B4A which when searching for devices takes a long time to find the module, then when connecting I get:

Error connecting: java.io.IOException:
read failed, socket might closed or
timeout, read ret: -1

I don't see where on the APP you put the UUID either?


Also I have tried the BLE Example BLE.B4A which seems to just have two sliders and not even a way to connect to devices.

I'm trying to get some kind of a starting point where I am able to pass data between my android device and a BLE RN4871 using transparent UART.

UUIDs
Service
49535343-fe7d-4ae5-8fa9-9fafd205e455
Read
49535343-1e4d-4bd9-ba61-23c647249616
Write
49535343-8841-43f4-a8d4-scbe34729bb3

Anyone able to tell me where I'm going wrong?

Thanks

 

[Erel]

There is no relation between BLE and classic Bluetooth. This means that the chat example is not relevant.

You need to start with the BLE example. It allows you to connect to discovered devices.

 

[ElliotHC]

I am very new to B4A and this is a small part of a very large project, I don't have lots of time to spend learning from the ground up.

I've picked B4A as a platform moving forward as it looked like I'd be able to easily understand it coming from a Basic background of more than 15 years.

I am also very new to Bluetooth with zero experience on the Android side, I expect to learn all about it as I go but I could really do with some help tying in this connection BLE_Example with sending and receiving serial data with my BLE device.

Once I've done this I would be very happy writing a detailed guide and project example once it's working.

If anyone has already done a serial data app with a BLE device I would very much appreciate any help.

Thanks